Hackers' Pub

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Luisf @Loosf@yiff.life

1/31/2026, 6:19:14 AM

Public

https://www.anthropic.com/research/AI-assistance-coding-skills

Anthropic's own fucking study lmao

"Yeah AI coding makes you worse at it"

like
significantly so

This tracks with my personal experience in my previous job.

Rapid deskilling when they started using llm "prompt engineering" for the code they pushed.

Within weeks they basically had stopped being able to explain what they were pushing during code review.

We found that using Al assistance led to a statistically significant decrease in
mastery. On a quiz that covered concepts they'd used just a few minutes before,
participants in the AI group scored 17% lower than those who coded by hand, or
the equivalent of nearly two letter grades. Using Al sped up the task slightly, but
this didn’t reach the threshold of statistical significance.

Importantly, using Al assistance didn’t guarantee a lower score. How someone
used Al influenced how much information they retained. The participants who
showed stronger mastery used Al assistance not just to produce code but to build
comprehension while doing so—whether by asking follow-up questions,
requesting explanations, or posing conceptual questions while coding
independently.

Results

On average, participants in the AI group finished about two minutes faster,
although the difference was not statistically significant. There was, however, a
significant difference in test scores: the AI group averaged 50% on the quiz,
compared to 67% in the hand-coding group—or the equivalent of nearly two
letter grades (Cohen's d=0.738, p=0.01). The largest gap in scores between the
two groups was on debugging questions, suggesting that the ability to
understand when code is incorrect and why it fails may be a particular area of
concern if Al impedes coding development.

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